Abstract: A pronounced heat-diffusing action for a battery pack, which has a plurality of battery cells (2) located in a housing (1), is created by shaping the wall of the housing (1) surrounding the battery cells (2) such that this wall forms at least one duct (3, 4) for a heat-diffusing medium, which duct is closed off from the interior of the housing (1).

Abstract: A pronounced heat-diffusing action for a battery pack, which has a plurality of battery cells (2) located in a housing (1), is created by shaping the wall of the housing (1) surrounding the battery cells (2) such that this wall forms at least one duct (3, 4) for a heat-diffusing medium, which duct is closed off from the interior of the housing (1).

Abstract: An apparatus for fixing a microscope holder on a carrier includes both a clamping device for holding the microscope holder in a selected position relative to the carrier, and a locking device for securing the microscope holder to the carrier especially while the clamping device is released during positioning of the microscope holder relative to the carrier. Accordingly, accidental dropping of the microscope holder or disconnection of the microscope holder from the carrier is prevented.

Abstract: A gear switchable planetary transmission for an electric hand power tool has a transmission housing, a hollow gear which is axially displaceable for a gear shifting and provided with a peripheral groove, a gear shifting member for an axial displacement of the hollow gear and provided with radial fingers engaging in the peripheral groove of the hollow gear, the gear shifting member having a shifting sleeve sliding on the gear transmission and at least one finger which is formed as a loop in at least one wire bracket, so that the at least one wire bracket is axially non displaceably inserted in the shifting sleeve and with its at least one loop engages through radial passages which are arranged over a periphery of the switching sleeve with offset in the transmission housing.